(A) carbon-8
(B) carbon-12
(C) carbon-16
(D) carbon-20
The answer is: (B) carbon-12
Category: Chemistry
A ________ consists of the elements in any one horizontal row of the periodic table.
(A) block
(B) base
(C) group
(D) period
The answer is: (D) period
An electrolyte is a substance that produces ________ solution when dissolved in water.
(A) conducting
(B) nonconducting
(C) poorly conducting
(D) B and C
The answer is: (A) conducting
The molecular formula of surcose (sugar or table sugar) is
(A) C6H12O6
(B) C12H22O11
(C) C6H12
(D) C12H22
The answer is: (B) C12H22O11
The atomic mass unit (amu) is equal to
(A) 1.66054×10–15 kg
(B) 1.66054×10–19 kg
(C) 1.66054×10–23 kg
(D) 1.66054×10–27 kg
The answer is: (D) 1.66054×10–27 kg
Isotopes are atoms whose nucleus have the same number of _____ but different number of _____.
(A) protons, neutrons
(B) protons, electrons
(C) neutrons, electrons
(D) electrons, positrons
The answer is: (A) protons, neutrons
The mass number is the total number of _____ and _____ in nucleus of an atom.
(A) protons, neutrons
(B) protons, electrons
(C) neutrons, electrons
(D) electrons, positrons
The answer is: (A) protons, neutrons
Oxidation is a
(A) loss of oxygen
(B) gain of hydrogen
(C) gain of electron
(D) loss of electron
The answer is: (D) loss of electron
The instrument which is used to measure the blood pressure is called:
(A) Spirometer
(B) Barometer
(C) Sphygmomanometer
(D) None of these
The answer is: (C) Sphygmomanometer
Biosensor is used to measure
(A) Blood glucose level
(B) The body pH value
(C) Amount of hemoglobin
(D) Salinity in Urine
The answer is: (A) Blood glucose level